First, sign up HERE, then check for your confirmation email. Once you sign up, download the app from the app store from your phone or other device and start saving! When I logged in one of the first offers I noticed was for Mio! Here is how that would work at Dollar General:
Mio at Dollar General $3
$1/1 MiO Energy (Ibotta Deposit you see on your phone)
$1/1 MiO Regular, Energy or Fit, exp. 2/28/13 (SS 01/27/13 R)
$1/2 MiO Liquid Water Enhancer printable
Final Price $1
Once you buy the Mio at Dollar General (with or without the extra manufacturer coupon) you take a photo of the receipt with the Ibotta app and they will put $1 into your PayPal account! This is great because you can stack the coupons, or just save money on products you were going to buy anyway!